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(No Model.)

I T. W. GREEN; (){LER'IOR SHAPTS 'OF PRESSURE BLOWERS.

No. 601,649. Patented Apr. 5,1898.

Inventor.

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UNITED STATES PATENT rion.

THOMAS W. GREEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE WILBRAI-IAM BAKER BLOWER COMPANY, OF SAME PLACE.

OILER FOR S HAl-TS OF: PRESSURE-BLOWERS.

SPECIFICATION forming part of Letters Patent No. 601,649, dated April 5, 1898. Application filed March 27, 1897. Serial a. 629,470. (No model.)

To all whom it may concern:

Be it known that I, THOMAS W. GREEN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have in vented certain new and useful Improvements in Oilers for Shafts of Pressure-Blowers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to oilers for the drivin g-shafts of pressure-blowers; and the objects of my improvement are to keep oil in constant contact with the journals on the driving-shafts of machines of this class and to prevent the pressure from theinside of the blower forcing the oil out at the ends of the shafts. To keep the oil in constant contact with the shaft, I construct the journal-box with an oil-reservoir that is connected by a pipe with the inside of the blower, thus allowing the pressure from the blower to act upon the oil in the reservoir and .force it up through passage-ways against the journal of the shaft. To prevent the oil from being forced out at the end of the shaft by the pressure from the inside of the blower, I-form on the inner end of the journal-box an annular groove that connects with avertical passageway or vent formed on the inner end of the j ournal-box.

In the accompanying drawings, Figure 1 is an end elevation, partly in section, of a rotary blower having my improvement thereon. Fig. 2 is a vertical sectional view of the end of a blower on line X X of Fig. 1.

A represents the end castings forming the supports for the driving-shafts.

' B is a section of the casing surrounding the impellers of the blower and attached to the end casting A.

C is the solid head on one of the impellers.

D is the driving-shafts, extending through the impellers.

E is a journal-box formed on the end casting A.

A is an oil-reservoir'formed on the'under side of the journal-box E.

a a are oil passages or ways extending from the oil-reservoir up through the journal-box to the journal on the driving-shaft.

. Z) Z) is a pipe extending from the oil-reservoirs to the inside of the casing surrounding the impellers.

b is an oil-cup on the pipe b. p

b is a valve for cutting off the pressure from the inside of the blower.

d is an annular groove formed in the journal-box E.

d is a vent or passage-way formed on the journal-box.

d is an overhanging lip forming a cover to prevent dirt from falling into the vent-passage d and getting on the shaft D. I

c is an oil-cup in the journal-box E.

To fill the oil-reservoirs A A, the valve 1) is first closed, so as to cut off the pressure from the inside of the blower. The oil is then poured into the cup I), flowing through the pipes 19 into reservoirs. After the reservoirs are filled the valve b is opened, and the pressurefrom theinside of the blower, acting through the pipes 12, will force the oil to pass up through the ways a a against the journals on the shafts D. The oil-cups 0 being kept filled, any loss of oil in the reservoirs will be replenished therefrom. The pressure from the inside of the blower around the driving-shaft D at the points indicated by the arrows would under ordinary circumstances force the oil out at the ends of the shafts. -To avoid this difficulty, annular grooves 61 are formed around the inside of the inner ends of the j ournal-boxes and the vents d made to register therewith. By this arrangement I relieve that part of the shaft that extends forward from the annular groove from any pressure, thus preventing the oil from being forced out.

Instead of the annular groove (1 being formed on the inside of the journal-box E it may be made on the outside of the drivingshaft D, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In a rotary blower, the combination of the journal-box E, provided with one or more of the oilways a, extending into the oil-reservoir A, and having therein the annular groove d, and vent-passage d, with the pipe I), havstantially as shown.

ingsuitable oil-inlet and extending from the oil-reservoir to the inside of the blower, sub- 2. In a rotary blower the combination of the journal-box E, provided With the oilways a, and oil-reservoir A, having suitable oil-inlet and annular groove d, registering with the vent-passage d, having the lip or cover d with a pipe 17, extending from the oil-reservoir to the inside of the blower and provided with a valve 11 located between the reservoir and the casing surrounding the blower, substantially as shown. r

3. In 'a rotary blower the journal-box E, having therein the oil way or ways a, and the vent-passage cl, and the reservoir A,- provided with a suitable inlet for the oil and connected with the inside of the blower, in combination with the shaft D, having therein an annular groove registering with the ventpassage in the journal-box, substantially as shown.

4. In a rotary blower, the combination of the impeller-shaft D, surrounded by an annular groove, with a journal-box provided with i the vent-passage d, having the overhanging lip or extension d substantially as and for the purpose described.

5. In a rotary blower a vent for shafts, said vent consisting of an annular groove surrounding the shaft and apassage leading from said groove to the outside of the journal-box, said vent being located in said journalbox between the blower-head and the oil-carrying journal-bearin gs of the journal-box, as set forth and for the purpose specified.

- '6. In a pressure-blower, the combination of the journal-box E, the journal therein and a suitable bearing for said journal, an oil-reservoir formed on the underside of the journal-box, and the oil-passages a, (1, extending from the reservoir up through the journalbox to the journal for the purpose of supplying oil to said journal, with the impeller or blower and pipes 17, 1), connecting the interior of the said blower With the oil-reservoir for the purpose of creating a pressure in said oilreservoir to force the oil therefor-m up through the passages a, 0., onto the said journal, as set forth. I v

In testimony whereof I aflix my signature in presence of two witnesses.

THOMAS IV. GREEN.

Witnesses:

THOMAS D. MOWLDS, SAML. H. KIRKPATRICK. 

